| (19) |
 |
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(11) |
EP 0 697 799 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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27.10.1999 Bulletin 1999/43 |
| (43) |
Date of publication A2: |
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21.02.1996 Bulletin 1996/08 |
| (22) |
Date of filing: 08.08.1995 |
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| (51) |
International Patent Classification (IPC)6: H04Q 7/38 |
|
| (84) |
Designated Contracting States: |
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DE FR GB |
| (30) |
Priority: |
18.08.1994 JP 193460/94
|
| (71) |
Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
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Kadoma-shi,
Osaka-fu, 571 (JP) |
|
| (72) |
Inventors: |
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- Nakano, Takayuki
Kanazawa-shi,
Ishikawa 920-02 (JP)
- Kato, Osamu,
Apt Hiyoshi Nichimo Dai5 Coporasu 205
Yokohama-shi,
Kanagawa, 223 (JP)
- Asano, Nobuo
Yokohama-shi,
Kanagawa, 241 (JP)
|
| (74) |
Representative: Crawford, Andrew Birkby et al |
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A.A. THORNTON & CO.
Northumberland House
303-306 High Holborn
London WC1V 7LE
London WC1V 7LE (GB) |
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| |
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| (54) |
Code division multiple access communication system |
(57) A CDMA system in which carriers are segregated according to self-sacrifice of a mobile
station and there is no communication quality deterioration due to shadowing is disclosed.
The mobile station detects a base station which became a cause of sudden increase
of the power when the reception power of the mobile station suddenly increased, generates
a self-sacrifice information and transmits the information to a base station which
is possible to be informed. The informed base station detects the self-sacrifice information
transmitted from the mobile station and informs to a mobile communication control
equipment. The mobile communication control equipment designates a carrier which is
prohibited to use hereafter and the base station. The base station concerned determines
to prohibit to use the designated carrier.